A Japanese zoo has apologized after receiving complaints over naming a baby monkey Charlotte for the newborn British princess.

The Takasakiyama Natural Zoological Garden said Thursday it was considering renaming the macaque. It was flooded with angry calls and emails Wednesday hours after announcing the name for its first monkey born this year, a tradition at the zoo run by the southern city of Oita.

Charlotte was the favorite in a public ballot, receiving 59 out of 853 votes in just over a month until Wednesday, when the female monkey was born.

Opponents largely said giving the princess' name to a monkey was disrespectful to British royals. According to zoo official Akira Asano, some of them said that the Japanese people would feel offended if a monkey were named after Japanese princesses.

The complaints originated in Japan. Asano said he was not aware of any complaints from British citizens. He said the zoo has also received support for Charlotte, and the views are now largely divided.

"We deeply apologize for causing trouble to many people over the naming of the first baby (monkey)," said a statement posted on the zoo website. "We take these opinions seriously."

Officials of the zoo and the city were still discussing what to do with the monkey's name.

The British Embassy in Tokyo declined to comment, while Japan's foreign ministry said it was not involved with the issue.